Improvement in bung-cutting machines



J.FRANZMANN. .Blmg-Cutti-ng Machine.

No. 197,114. Patented Nov. 13,1877.

Ill

' erative parts of the machine.

UNITED4 STATES PATENT CFFIQE.

JACOB FRANZMANN, OF CINCINNATI, OHIO,'ASSIGNOR OF ONE-HALF HIS RIGHT TO HENRY VARWIG, OF SAME PLACE.

IMPROVEMENT IN BUNG-CUTTING MACHINES.

Specication forming part of Letters Patent No. 197,114, dated November 13, 1877 application filed February 19, 1877.

To all whom it may concern:

Be it known that I, JACOB FRANZMANN, of

A Cincinnati, in the county of Hamilton and State of Ohio, have invented a new and useful Machine for Cutting Bungs, which improvement is fully set forthin the following specification and accompanying drawings, in which- Figure 1 is a perspective view of the machine. Fig. 2 is a vertical section of the revolving mandrel, cutter-head, and their connections. Fig. 3 shows a portion of the automatic feeding device. Fig. 4 is a transverse section of the cutter-head, taken through the line w .fr of Fig. 2; and Fig. 5 is a view of the mandrel and knife-holder in a plane at right angles to the view shown in Fig. 2,the clamps t being removed.

The object of this invention is amachine for cutting bungs; and consists in combinations of devices for automatically feeding the strips of material from which the bungs are to be cut, centering and holding the bung while it is operated upon by the cutters, stamping the bun g, after it is cut, with the name orcard of the manufacturer, and discharging the iinished bungs from the machine successively.

In the drawing, A represents a metal plate, to which are secured the bearings for the op- A is the bedplate. rIhese two I prefer to make of one piece, so that the machine maybe fitted up complete in the machine-shop, so that when it is to be put upfor use it is only necessary to secure the plate to a pillar or other support. B B are standards secured to plate A, to serve as journal-bearings for mandrel E and guides for the frame, composed of yokes D D land side guidebars C C, which carries the sliding tool-holder r and centering-shaft or bung-holder l. F and F are driving-pulleys, the former'for driving mandrel E and the latter for driving shaft H, which shaft carries the cam G and arm I, with its anti-friction roller I'.

The feeding mechanism is composed of the rack and pinion 7c and 7c', ratchet e, pawl el, and feed-wheel v2. The frame J, which carries the rack, is iitted to slide in plate A, and is depressed by the anti-friction roller I on arm I, striking the projection J', and elevated by its Striking the upper bar of the frame at each revolution of the shaft H. The pawl Q11 is pivoted to the side of the loose pinion k', and kept in contact with its ratchet by asprin' g, as shown, or other suitable means. The shaft upon which the feed-wheels are is journaled in a boxing, s1, which is fitted to slide vertically in standard s, and is kept down by a spring between the boxing and the cap s2, so that the feed-wheel juz may adjust itself to unequal thicknesses of stuif passing under it. r is a coupling, in the form of a sleeve, loosely fitted on the mandrel E, and grooved on its periphery, to receive a corresponding projection in the yoke D. Projecting down from it on each side are T-shaped lugs r', to enter corresponding cavities in the tool-holders m m. These tool-holders are held and guided on an incline with reference to the axis of rotation by the beveled sides of the mandrel and inclined grooves in the clamps t t, which receive the tenons which project from the edges of the tool-holders.

The weighted lever n is pivoted to the plate A, and secured to the centering-shaft Z, which passes through it. Z is a plate secured to the lower end of the bung-holder or centeringshaft l. It is intended to press upon the wood, and hold it firmly while it is being cut, and it may have the card of the manufacturer or other letters raised upon its under face, if desired.

The clamps t t are two segments, having each a central bearing-surface fitting the mandrel, and an inclined groove on each side of this bearing for the reception of the tenons of the tool-holders fm, as seen best in Fig. 4. These clamps are secured by screws to the mandrel E, and revolve the tool-holders while perinittin g them to be carried down at the proper inclination by the sleeve-coupling r. z are the cutters, which are held in slots in the holder in by set-screws.

When it is desired to set the knives farther out, to cut larger sized-brings, thin plates of metal are placed between the knives and the inner-side of the slot in the holder, the slot being sufficiently large to admit of the knives being adjusted to cut several sizes of bungs.

lt will be necessary to vary the feed according to the size of bung. This is done by adjusting the anti-friction roller I nearer to or farther from the axis of rotation in the slotin arm I.

In operation the frame carrying the sleevecoupling r is driven down by cam G on shaft H, and when it has passed the offset on the cam the springs, coiled around the side guides C G and compressed between they upper standard B and yoke D', return the frame to its elevated position. At this moment the antifriction roller I on arm I, striking .the projection J', feeds a sufficient length of stui' for another bung. As the frame starts down, the point on .the lower end of centering-shaft l, which is in advance of the cutters, will be brought down by weight e upon the Wood, thus holding the bung and steadying the movement of the cutters. Just as the bung is cut from the strip the yoke D m'll strike the lever fn, and print the letters on plate l upon the bung, and as the frame is returned by the.

cam; for depressing thetrame, andthe springs y for holding it in contact with the cam.

3. The combination of rack and pinion kk', ratchet and pawl v v1, spur-wheel c andframe J, operated by cam-wheel I on shaft l1', for feeding the material to the cutters, substantially as specied.

4. The combination, substantially as speclfied, of the hollow localized rotating mandrel,

the cutter-head attached thereto, the rotating v cutters having also a slanting `rectilinear motion, the centering-shaft, and the weighted le ver connected therewith..

J AGOB FRAN ZMANN.'

Witnesses:

JAMES MOORE, GEO. J. MURRAY. 

